1、如下代码报错：

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$xml = " < ![CDATA[toUser] ]> < ![CDATA[fromUser] ]> 1348831860 < ![CDATA[text] ]> < ![CDATA[this is a test] ]> 1234567890123456 ";
$obj=simplexml_load_string($xml,'SimpleXMLElement',LIBXML_NOCDATA);
var_dump($obj);
$obj1=simplexml_load_string($xml,'SimpleXMLElement');
var_dump($obj1);
?>

php调试错误提示：Warning: simplexml_load_string(): Entity: line 1: parser error : StartTag: invalid element name in C:\wamp64\www1\test1.php on line 4

2、后来重新书写了xml数据，调试通过，返回值成功

$xml = "






1348831860






1234567890123456
";
$obj=simplexml_load_string($xml,'SimpleXMLElement',LIBXML_NOCDATA);
var_dump($obj);
$obj1=simplexml_load_string($xml,'SimpleXMLElement');
var_dump($obj1);
?>

3、注意加入LIBXML_NOCDATA参数后的区别，结果如下：

var_dump($obj)如下：

C:\wamp64\www1\test1.php:20:
object(SimpleXMLElement)[1]
public 'ToUserName' => string '
toUser
' (length=12)
public 'FromUserName' => string '
fromUser
' (length=14)
public 'CreateTime' => string '1348831860' (length=10)
public 'MsgType' => string '
text
' (length=10)
public 'Content' => string '
this is a test
' (length=20)
public 'MsgId' => string '1234567890123456' (length=16)

var_dump($obj1)如下：

C:\wamp64\www1\test1.php:22:
object(SimpleXMLElement)[2]
public 'ToUserName' =>
object(SimpleXMLElement)[3]
public 'FromUserName' =>
object(SimpleXMLElement)[4]
public 'CreateTime' => string '1348831860' (length=10)
public 'MsgType' =>
object(SimpleXMLElement)[5]
public 'Content' =>
object(SimpleXMLElement)[6]
public 'MsgId' => string '1234567890123456' (length=16)

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